87 lines
3.5 KiB
TypeScript
87 lines
3.5 KiB
TypeScript
import type { ImageDocument } from "@core/document";
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import type { Layer } from "@core/layer";
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import type { ViewportState } from "@editor/state";
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import { resolveTransformTargetBounds } from "@editor/transform-targets";
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import { clearScreenRect } from "./clear-rect";
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import type { ImageTextureRenderer } from "./image-textures";
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import { documentRectToScreenRect } from "./screen-rect";
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import type { RgbaColor, ScreenRect, WebGlRendererContext } from "./types";
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const imageLayerColor: RgbaColor = [0.38, 0.42, 0.5, 1];
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const imageLayerInsetColor: RgbaColor = [0.48, 0.54, 0.64, 1];
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export function renderLayers(context: WebGlRendererContext, document: ImageDocument, viewport: ViewportState, imageTextureRenderer: ImageTextureRenderer) {
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for (const artboard of document.artboards) {
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if (!artboard.visible) continue;
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const clipRect = documentRectToScreenRect(context.canvas, artboard.bounds, viewport);
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const maskLayerIds = collectMaskLayerIds(artboard.layers);
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for (const layer of artboard.layers) renderLayer(context, document, viewport, layer, imageTextureRenderer, clipRect, maskLayerIds);
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}
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}
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function renderLayer(
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context: WebGlRendererContext,
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document: ImageDocument,
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viewport: ViewportState,
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layer: Layer,
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imageTextureRenderer: ImageTextureRenderer,
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clipRect: ScreenRect,
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maskLayerIds: ReadonlySet<string>,
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) {
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if (!layer.visible || maskLayerIds.has(layer.id)) return;
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const effectiveClipRect = resolveLayerClipRect(context, document, viewport, layer, clipRect);
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if (!effectiveClipRect) return;
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if (layer.type === "group") {
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for (const child of layer.children) renderLayer(context, document, viewport, child, imageTextureRenderer, effectiveClipRect, maskLayerIds);
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return;
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}
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const bounds = resolveTransformTargetBounds(document, { type: "layer", id: layer.id });
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if (!bounds) return;
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const rect = documentRectToScreenRect(context.canvas, bounds, viewport);
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const asset = document.assets.find((candidate) => candidate.id === layer.assetId);
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if (asset && imageTextureRenderer.render(asset, rect, effectiveClipRect)) return;
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const fallbackRect = intersectScreenRects(rect, effectiveClipRect);
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if (!fallbackRect) return;
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clearScreenRect(context, fallbackRect, imageLayerColor);
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const insetRect = intersectScreenRects({ x: rect.x + 4, y: rect.y + 4, w: Math.max(0, rect.w - 8), h: Math.max(0, rect.h - 8) }, effectiveClipRect);
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if (insetRect) clearScreenRect(context, insetRect, imageLayerInsetColor);
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}
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function resolveLayerClipRect(
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context: WebGlRendererContext,
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document: ImageDocument,
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viewport: ViewportState,
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layer: Layer,
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clipRect: ScreenRect,
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): ScreenRect | undefined {
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if (!layer.clippingMask) return clipRect;
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const maskBounds = resolveTransformTargetBounds(document, { type: "layer", id: layer.clippingMask.maskLayerId });
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if (!maskBounds) return undefined;
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return intersectScreenRects(clipRect, documentRectToScreenRect(context.canvas, maskBounds, viewport));
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}
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function collectMaskLayerIds(layers: readonly Layer[], ids = new Set<string>()) {
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for (const layer of layers) {
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if (layer.clippingMask) ids.add(layer.clippingMask.maskLayerId);
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if (layer.type === "group") collectMaskLayerIds(layer.children, ids);
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}
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return ids;
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}
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function intersectScreenRects(a: ScreenRect, b: ScreenRect): ScreenRect | undefined {
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const x1 = Math.max(a.x, b.x);
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const y1 = Math.max(a.y, b.y);
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const x2 = Math.min(a.x + a.w, b.x + b.w);
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const y2 = Math.min(a.y + a.h, b.y + b.h);
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if (x2 <= x1 || y2 <= y1) return undefined;
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return { x: x1, y: y1, w: x2 - x1, h: y2 - y1 };
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}
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